Metric Measurement is the third of five self-paced lessons in the “Measurement” section. This lesson features basic metric units for length, weight, and volume. It also introduces the prefixes of kilo-, centi-, and milli- and their relationship to multiples of 10. KET’s GED® Geometry Professional Development Online Course is designed to help you review and build your skills and knowledge of geometry concepts and to help you to gain confidence in preparing your learners for a substantial portion of the GED Mathematics Test. Click on the view button on the left to begin Lesson 3.